Cleaning a dissolved oxygen (DO) sensor involves carefully removing contaminants to ensure accurate readings. Here's a step-by-step guide:
Steps to Cleaning a Dissolved Oxygen Sensor
-
Initial Cleaning: Start by gently wiping the sensor membrane with a dust-free cloth or tissue paper dampened with deionized water. This removes loose particles.
-
Dealing with Organic Matter: If you observe oil, grease, or other organic contaminants on the membrane, use a cloth or tissue moistened with isopropyl alcohol to carefully clean the surface.
-
Addressing Other Contaminants: For other types of matter, a mild, non-aggressive detergent such as Alconox® can be used. Ensure thorough rinsing with deionized water after using any detergent.
-
Final Rinse: After cleaning with any solvent or detergent, always rinse the sensor thoroughly with deionized water to remove any residual cleaning agents.
Important Considerations:
- Membrane Sensitivity: The membrane of a DO sensor is delicate. Avoid abrasive cleaners or excessive force that could damage it.
- Regular Maintenance: Regular cleaning, even if the sensor appears clean, will help prevent buildup and maintain accuracy. The frequency of cleaning depends on the application and the environment in which the sensor is used.
- Calibration: After cleaning, it's crucial to recalibrate the DO sensor to ensure accurate measurements.
- Storage: When not in use, store the sensor according to the manufacturer's recommendations. This usually involves keeping the membrane moist.
In summary, cleaning a dissolved oxygen sensor involves using deionized water, isopropyl alcohol for organic matter, or a mild detergent for other contaminants, always followed by thorough rinsing and recalibration.
